Dirty Fingernails are a part of life. Deal with it. Embrace it. Enjoy it.

And when you run into obstacles, look for the opportunities. 

Something as simple as shaving a bolt face down to fit in an orientation it wasn't intended can give you unique functional and mounting opportunities, as with the Fuel Pressure regulator.

I wanted it mounted in a certain position, in a particular place that wasn't allowed by the mounting kit provided, so I made my own solution that worked brilliantly.